ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,433,805, issued on Oct. 7, was assigned to KAIST (KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY) (Daejeon, South Korea).

"Manual wheelchair propulsion aid device using mechanical self-energizing action" was invented by Sei-Bum Choi (Daejeon, South Korea) and Min-Hyun Kim (Daejeon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A propulsion assist device connected to a manual wheelchair to provide driving force is disclosed. The propulsion assist device provides sufficient driving force and braking force while using the motor by the self-energizing effect. The propulsion assist device can be easily connected to manual wheelchairs without ...